Flow based incentive spirometer



FIG. 1 is a frontal perspective view of the flow based incentivespirometer;

FIG. 2 is a front elevational view of the flow based incentivespirometer;

FIG. 3 is a rear elevational view of the flow based incentivespirometer;

FIG. 4 is a top plan view of the flow based incentive spirometer;

FIG. 5 is a left side elevational view of the flow based incentivespirometer;

FIG. 6 is a right side elevational view of the flow based incentivespirometer; and,

FIG. 7 is a bottom plan view of the flow based incentive spirometer asillustrated in FIG. 1.

The ornamental design for a flow based incentive spirometer, as shownand described.